Balance Sheet Details (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of inventories
Raw material and purchased parts	$ 14,218	$ 13,114
Work-in-process	3,262	1,753
Finished goods	21,890	17,511
Inventory, Finished Goods, Consigned	3,206	9,242
Total inventories	$ 42,576	$ 41,620